下面的这个程序哪里出错了，没错的话，那它的运行结果是多少？

#include<stdio.h>
                      #include<math.h>
       void main()
{   
    float a,b,c,s,area:
                      scanf(“%f ,%f, %f”,&a,&b,&c);
                      s=1.0/2*(a+b+c);

       area=sqrt(s*(s-a)*(s-b)*(s-c));

      printf(“a=%7.2f,  b=%7.2f,  c=%7.2f,  s=%7.2f\n”,a,b,c,s);

             printf(“area=%7.2f\n”,area);      
          }